Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
  • C08K13/02—Organic and inorganic ingredients
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
  • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
  • C09C1/22—Compounds of iron
  • C09C1/24—Oxides of iron
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
• • A—HUMAN NECESSITIES
  • A41—WEARING APPAREL
  • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
  • A41D19/00—Gloves
  • A41D19/0055—Plastic or rubber gloves
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
  • C08K5/45—Heterocyclic compounds having sulfur in the ring
  • C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L21/00—Compositions of unspecified rubbers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L7/00—Compositions of natural rubber
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
  • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
  • C09C1/22—Compounds of iron
• • A—HUMAN NECESSITIES
  • A41—WEARING APPAREL
  • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
  • A41D2400/00—Functions or special features of garments
• • A—HUMAN NECESSITIES
  • A41—WEARING APPAREL
  • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
  • A41D2500/00—Materials for garments
  • A41D2500/50—Synthetic resins or rubbers
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
  • C01P2006/00—Physical properties of inorganic compounds
  • C01P2006/42—Magnetic properties
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
  • C08K2003/2265—Oxides; Hydroxides of metals of iron
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
  • C08K2003/2265—Oxides; Hydroxides of metals of iron
  • C08K2003/2272—Ferric oxide (Fe2O3)
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
  • C08K3/013—Fillers, pigments or reinforcing additives
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/05—Alcohols; Metal alcoholates
  • C08K5/053—Polyhydroxylic alcohols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
  • C08K5/45—Heterocyclic compounds having sulfur in the ring
  • C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
  • C08K5/47—Thiazoles

Definitions

• Gloves are important protective equipment used to avoid cross contamination in food and beverages industries. However, in some cases, a fragment or a torn glove piece itself could become a contaminant in food and beverages. Conventionally, visual inspection has been used as a method to identify contaminants in food and beverages.
• the present invention relates to a metallic pigment additive comprising iron oxide, wherein the iron oxide is in ⁇ -Fe 2 O 3 hematite phase and used in an amount ranging between 20% to 30% by weight of the metallic pigment additive; surfactant, wherein the surfactant is used in an amount ranging between 2% to 4% by weight of the metallic pigment additive; preservative, wherein the preservative is used in an amount ranging between 0.2% to 0.3% by weight of the metallic pigment additive; stabilizer, wherein the stabilizer is used in an amount ranging between 0.2% to 0.4% by weight of the metallic pigment additive; and solvent, wherein the solvent is used in an amount to achieve 100% by weight of the metallic pigment additive.
• the present invention relates to a glove that is prepared from the latex formulation as mentioned above.
• the present invention relates to a metallic pigment additive, in particular the metallic pigment additive is used in a latex formulation to prepare a glove that is detectable by a metal detector without compromising the mechanical properties. Ideally, this approach is taken to detect glove contamination in the food and beverages industry during packaging process before reaching the market.
• the glove of the present invention that includes a metallic pigment additive will be referred as metal detectable glove.
• the metal detectable glove of the present invention ensures the metallic pigment additive is safe to be used in the food and beverages industries. Further, the metal detectable glove of the present invention may be used in various industries/applications such as but not limited to cosmetic, textiles and/or pharmaceuticals.
• First aspect of the present invention discusses on a metallic pigment additive, wherein the metallic pigment additive comprises:
• the anionic surfactant is selected from the group consisting of sulphonic acid, stearic acid and mixtures therefrom, preferably sulphonic acid.
• the non-ionic surfactant is selected from the group consisting of alcohol ethoxylates, alkylphenol ethoxylates, fatty alcohol polyglycol ethers, glyceryl esters, sorbitan esters and mixtures therefrom, preferably alcohol ethoxylate.
• the metallic pigment additive of the present invention has pH ranging between 7 to 14, preferably ranging between 7.5 to 13.5, most preferably 9.5 and total solid content is ranging between 10% to 50%, preferably ranging between 20% to 48%, most preferably 40%.
• the metallic pigment additive of the present invention has particle size of D10 of 0.5 ⁇ m and particle size of D90 of 2.4 ⁇ m.
• the metallic pigment additive of the present invention has viscosity ranging between 30 cP to 200 cP, preferably ranging between 50 cP to 100 cP, most preferably 70 cP (measured at speed of 100 rpm using spindle 1 and Brookfield LVT).
• Table 1 shows the chemical components (as listed above) and compositions thereof used to prepare the metallic pigment additive of the present invention.
• Table 1 Chemical components and compositions thereof used to prepare the metallic pigment additive of the present invention Chemical components Working range, wt% Preferred range, wt% Typical value, wt% Iron oxide in ⁇ - Fe 2 O 3 hematite phase 20.0 to 30.0 23.0 to 28.0 25.0 Surfactant 2.0 to 4.0 2.5 to 3.5 3.0 Preservative 0.2 to 0.3 0.25 to 0.28 0.26 Stabilizer 0.2 to 0.4 0.25 to 0.35 0.30 Pigment 16.0 to 22.0 18.0 to 21.0 20.0 Solvent Used in an amount to achieve 100% by weight of the metallic pigment additive
• Second aspect of the present invention discusses on a method of preparing the metallic pigment additive of the present invention with the chemical components listed in Table 1, wherein the metallic pigment additive of the present invention is prepared by mixing the iron oxide in ⁇ -Fe 2 O 3 hematite phase, surfactant, preservative, stabilizer, pigment and solvent one after another with no particular order, wherein the mixing is carried out for a duration ranging between 30 minutes to 480 minutes, preferably 180 minutes for a speed ranging between 600 rpm to 1500 rpm, preferably 900 rpm.
• Third aspect of the present invention discusses a glove, wherein glove comprises the metallic pigment additive of the present invention in which its composition is as described in Table 1 and prepared based on the method as described in the second aspect of the present invention.
• the latexes used to prepare the gloves of the present invention can be but not limited to natural rubber (NR) latex, acrylonitrile butadiene rubber (NBR) latex, polyisoprene (PI) latex, polychloroprene (CR) latex, polyurethane (PU) latex and mixtures thereof.
• NR natural rubber
• NBR acrylonitrile butadiene rubber
• PI polyisoprene
• CR polychloroprene
• PU polyurethane
• the method of manufacturing the glove of the present invention was adopted from any commonly known method in the glove manufacturing industry, wherein the method includes the steps of:
• the latex formulation used in step (iv) as mentioned in the method above can be of any conventional latex formulation having metallic pigment additive of the present invention, preferably comprises base polymer (i.e. acrylonitrile butadiene rubber latex), pH adjuster (i.e. potassium hydroxide), opacity enhancer (i.e titanium dioxide), crosslinking agent (i.e. mixture of sulphur and zinc oxide), accelerator (i.e. mixture of zinc diethyldithiocarbamate and zinc dibutyldithiocarbamate), stabilizer (i.e. sodium dodecylbenzenesulphonate), thickener (i.e. alkali swellable acrylic polymer emulsion), antitack agent (i.e. paraffin wax), dispersing agent (i.e. sodium poly(naphthaleneformaldehyde) sulphonate), antifoaming agent (i.e. silicone emulsion) and metallic pigment additive of the present invention.
• Table 2 shows the chemical components (as listed above) and compositions thereof used to prepare the glove of the present invention.
• Table 2 Chemical components and compositions thereof to prepare the glove of present invention Chemical components
• Working range (phr) Preferred range (phr) Typical value (phr)
• Base polymer 100 100 100 pH adjuster 0.5 to 3.0 0.6 to 2.9 1.6 Opacity enhancer 0.6 to 1.8 1.0 to 1.7 1.65 Crosslinking agent 0.8 to 3.6 1.1 to 2.7 2.3 Accelerator 0.2 to 1.0 0.3 to 0.9 0.4 Stabilizer 0.4 to 1.0 0.5 to 0.8 0.7 Thickener 0.1 to 0.7 0.15 to 0.6 0.5 Antitack 0.1 to 0.5 0.15 to 0.3 0.2 Dispersing agent 0.5 to 1.5 0.6 to 1.3 1.1 Antifoaming agent 0.005 to 0.1 0.01 to 0.05 0.02 Metallic pigment additive of the present invention 2.0 to 30.0 10.0 to 20.0 15.0
• the metal detectable glove of the present invention has a thickness ranging between 0.01 mm to 0.40 mm, preferably ranging between 0.05 mm to 0.40 mm at palm area.
• the glove of the present invention can be detected by but not limited to a metal detector and/or the following settings and/or parameters, wherein the metal detector has chamber's aperture size of 300 mm x 100 mm, frequency settings ranging from 50 kHz to 1 MHz at detection sensitivity of an iron ball (Fe) having a diameter of 0.6 mm, non-ferrous (NFe) diameter of 0.8 mm and stainless steel (SS) diameter of 1.0 mm with a phase angle is set between 0° to 360°, where the minimum size of glove fragment that can be detected is 5 mm x 5 mm and minimum thickness of glove fragment that can be detected is 0.01 mm, provided that the mechanical properties of the gloves are not compromised.
• the metal detectable glove of the present invention has magnetization ranging between 0.10 emu/g to 1.0 emu/g
• Set 1 refers to a conventional glove without metallic pigment additive and Set 2 refers to the metal detectable glove comprising metallic pigment additive of the present invention.
• the gloves mentioned above are tested for mechanical properties such as tensile strength and elongation at break according to American Society for Testing and Materials (ASTM D6319) standard requirements for both before and after aging at 100°C for 22 hours. Further, the gloves mentioned above are tested against overall migration test (OMT) based on European regulation for food contact materials for ethanol and acetic acid.
• ASTM D6319 American Society for Testing and Materials
• OMT overall migration test
• Table 3 displays the outcome of tensile strength and elongation at break for conventional glove and metal detectable glove of the present invention.
• Table 3 Outcome of tensile strength and elongation at break for conventional glove and metal detectable glove of the present invention Set Tensile strength, MPa Elongation at break, % Before aging After aging Before aging After aging Set 1 23.5 19.2 567 446 Set 2 31.3 30.5 549 477 Standards Min 14 Min 14 Min 500 Min 400
• the metal detectable glove of the present invention meets all the requirements of ASTM D6319 for the tensile strength and elongation at break. Further, it is noticeable that the metal detectable glove of the present invention (Set 2) has higher tensile strength as compared to conventional glove (Set 1) for both before and after aging indicating that the metallic pigment additive of the present invention improves the strength of the glove. Also, it is noticeable that the metal detectable glove of the present invention (Set 2) has higher elongation at break as compared to conventional glove (Set 1) for after aging.
• Table 4 displays the results tested against OMT based on European regulation for food contact materials (i.e. 50% ethanol and 3% acetic acid) for conventional glove and metal detectable glove of the present invention.
• Table 4 Results tested against OMT based on European regulation for food contact materials for conventional glove and metal detectable glove of the present invention Set Overall migration limit (mg/dm 3 ) Ethanol Acetic Acid Set 1 9.0 7.7 Set 2 4.5 5.1 Standard limit ⁇ 10 mg/dm 3
• the metal detectable glove of the present invention meets the requirements of OMT based on European regulation for food contact materials. Hence, the metal detectable glove of the present invention is safe to be used in the food and beverages industries. Further, it is noticeable that the metal detectable glove of the present invention (Set 2) has lower overall migration limit as compared to conventional glove (Set 1), indicating that the metal detectable glove of the present invention has lower leaching of components.
• metal detectable glove of the present invention is able to overcome the conventional shortcomings because it comprises an appropriate metallic pigment additive that is usable for detection of the glove contamination in the food and beverages industries using a metal detector, wherein the minimum thickness of glove fragment that can be detected is 0.01 mm as well as meets all the standard requirements for mechanical properties which shows that the mechanical properties are not compromised.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Gloves (AREA)
• Cosmetics (AREA)

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• 2024
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  • 2024-08-28 JP JP2024146462A patent/JP2025106152A/ja active Pending
  • 2024-09-03 US US18/823,440 patent/US20250215197A1/en active Pending
  • 2024-09-04 EP EP24198457.4A patent/EP4582492A3/de active Pending

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